Atomizer



Sept. 22,` ,554,362

' R. F. METQALFE:

momma F-ild Aug. 5G, 1922- um mum l llfatente'dI `Sept` 22,

UNITED STATES PATENT OFFICE,

ROBERT B. METOALBE, OE ERIE, PENNSYLVANIA, AssIGNOR, BY .MEsNE AssIGNi/IENTS, To SOOONY BURNER ooRroR-ATION,` or WILMINGTON, DELAWARE, A' CORPORATION OE DELAWARE.y l

ATOMIZER.

Applieation inea August' v3o,` 1922. serial No. 585,218.

T o 'all whom t Lmay oofncerm.

- Be it known that I, ROBERT F. METCALFE, a citizen of the United States,` residing at Erie, in the countyv of Erie and State of t Pennsylvania, have invented new and usefulV Improvements .1n 'Atom1zers, of which. the

following is a specification.

This invention is designed to simplify and improve the construction of devices for atp omizing fuel, particularly for fuel burners.

.' ing carrying the cone 2 andthe atomizer. y

The mounting forms lthe rear of the burner and has a passage' leading from afuel sup-l ply pipe 7 and a passage 6 leading from an air suppl-y pipe 8. The mounting has a screwthrevaded opening9 extending through it in which the mixture nozzle 10 is screwed, the` mixture nozzle having a-contracted or Venturi-shaped opening 11 at its discharge end. The nozzle has a chamber 12 leading to the contracted portion 11 and radial openings 13 lead from the chamber 12 into an annular groove 111, the annular groove being so positioned on the nozzle that it is brought into registerrwith the passage 5 as the nozzle is screwed into the screw-threaded opening 9. A fuel jet nozzle 15 has` a jet opening 16 concentricv with the contracted opening 11 and so positioned in the chamber 12 as to draw in fuel and atomize the same through the mixture opening. The rear end of the nozzle is of a. size to close the end of the chamber 12 and is provided with a shoulder 17 which is engaged by the end of the mixture nozzle 10. A plug 18 has an opening 19 adapted to .it over. the end of thefuel nozzle 15. A packing 2O is arranged between the end of the plug 18 and the rear of the shoulder' 17, the rear of this shoulder being tapered and the end of the plug being tapered so as to exi pand the packing in the screw-threaded opening and form a complete closure at this point. 7 I The plug has radial openings 22 leading from thetopening 19 and these openings ylea into an annular groove 28 which groove registers with ythe passage 16. lt will readily be Fig. 2 a'section on the line 2-2 in Fig. 1'.4

seen, therefore, 'that regardless of how the plug 18 may be turned air passes from the passage 6 into the annular groove 23 through the 'radial openings into the opening 19 and froml this through` the nozzle 15 to the jet.' In order to prevent any material entering the jet Iprovide a screen 24 over the endof f the nozzle 15 and this is held in position by a spring 25 arranged in the opening 19. Thenozzle 10 is 'provided with ahead and a gasket 26 isr arranged under this head toassure a tight joint against the leakage offuel from the passage 5. TheplugflS also has a head and a gasket 27 is arranged underv this head so as to complete the closure at the end of the plug against leakage of air .the passage 6.

In the operation of the device air under from pressure is delivered through the passage@` passes through the annular chamber 23 and passages 22 to the opening 19.

The air .passes from this through the nozzle 15 discharging at the 16 Aand aspirates the fuel moving from the fuel passage 5 through the annular' passage 14, radial openings 13 to the opening or chamber 12. Vlhe jet not only aspirates the fuel passing through the mix ture nozzlel()` but sprays the mixture from 4the Venturrshaped opening 11 at the discharge endhof the nozzle. The rich mixture aus delivered is ignited by the spark plug 3.

'"What llclaim as new is z- 1.' ln an atomizer, the combination of a mounting, having a`screw-threaded opening therethrough; a mixture jet nozzle screwed into the opening having a chamber at its rear with a fuel connection; an air nozzle extending into the chamber; and a plug screwed into the rear of the mounting and having an air connection and forming a `joint with the air nozzle.

2. ln anatomizer, the combination of a mounting having a screw-threaded opening therethrough; a mixture jet nozzle screwed into the opening having a chamber alt its rear with a fuel connection; an air nozzle extending into` the chamber; and a plug screwed into the rear ofthe mounting and having an opening receiving tie air nozzle and formi-ng a joint therewith, said plug having nozzle.

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3. ln an atomizer., the combination of a baring a screw-threaded opening inountin -into the rear of the mounting therethrough; a mixture jet nozzle screwed into the opening having a ehamberat its rear with a fuel connection; an air nozzle extending into the chamber; a plug screwed and having an air connection and forming a joint with the air nozzle: and/'a packing at the rear end ot' the nozzle expanded h v the pressure between the plug and the mixture nozzle forming a closure in the screw-threaded opening.

4. In an atomizer, the combination ot a mount ing having a screw-threaded opening therethrough; a mixture jet nozzle screwed into the opening and having a chamber at `its rear with a fuel connection; an ain nozzle extending into thc chamber and h ving a shoulder at its end engagingthe end ot the niixture nozzle; a plugl screwed into the rear ot the screw-threaded opening forming a joint with the air nozzle and having an air (-onnection: and a packing hetween the end ot' the plug and the shoulder on the air nozzle. i

ln an atomizer, the combination of a mounting having a screw-threaded opening therethrough and a fuel passage therein; a

mixture nozzle screwed intothe opening havinga chamber therein with a radial opening leading therefrom and an annular groove to which the radial opening` leads; an air nozzle extending into the chamber; and means for securing the air nozzle in place and connecting the same to an air supply.

G. In an atomizer, the combination ot a mounting having a screw-threaded opening therethrough and an air passage therein; a mixture jet nozzle screwed'into the opening; an air nozzle leading` into the mixture jet nozzle; a plug arranged in the rear of the screw-threaded opening, said plug having an opening connnunica'ting with the air nozzle and a radial opening leading from the opening in the plug; and an annular groove communicating with the radial opening, said annular groove' registering with the passage in the mounting.

7. ln an atomizer, the combination of a mounting having a screw-threaded opening thertthrough, a i'uel passage therein, and an air passage therein: a mixture jet nozzle screwed into the opening and having a chamber at its rear from-which leads a radial opening; an annular groove towhich the radialA opening leadsy communicating with the fuel passage; an air nozzle aranged in the chamber; and' a plug securingthe air nozzle and communicating therewith, the plug having a central opening, a radial opening' leading therefrom and an annular groove leading tothe radial opening, the annular groove communicating with the air passage in the mounting.

8. In an atomizer, the combination of a mounting having a screw-'threaded opening therethrough, a `fuel passage therein, and an air passage therein; a mixture nozzle screwed into the screw-threaded opening, said nozzle havingl a chamber at its inner end, a radial opening leading from the chamber, and an annular groove to which the radial opening` leads, the annular groove communicating 'with the fuel passage; an air nozzle extending into the chamber and l having a shoulder at its rear; a plug at the rear ot' theA screw-threaded opening and having an opening into which the air nozzle extends, radial openings leading from the opening in the plug, and an annular groove on the plug to which the radial groove in the plug leads, said annular groove registering with the air passage; and a, gasket between the end of the plug and the shoulder on the air nozzle.

9. In an atomizer, the combi-nation ot a mounting having a screw-threaded opening therethrough; a mixture jet nozzle screwed into the opening having a chamber at its rear with a 'fuel connection; an airnozzle extending into the chamber; a plug screwed inio the rear ot the mounting and having an opening receiving the air ynozzle and forming a joint therewith, said plug having an air connection leading to the nozzle; a screen in the opening in the plug over the end ot the air nozzle; and a spring arranged in the opening in the ,plug and holding the screen in place.

ln testimony whereof l have hereunto set my hand. i

ELETCALFE.

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